Stenciling machine



Oct 27, 1925- 1,559,058 L. A. THATCHER STENCILING MACHINE Filed June 30.23 v 3 Sheets-Sheet 1 Oct. 27,1925. 1. 5

' L. A. THATCHER STENCILING Filed, June so. 1923 s Sheets-Sheet glnren/or:

b f 1 Attorney Oct. 27,1925.

' w v L. A. THATCHER v STENC ILING MACHINE Filed June 30. 1925 5 sSheets-Sheet 5 24m Mm/5254 by Mm Patented Oct. 27, 1925.

UNITED STATE s PATENT QFFIICE.

V i LINDEN A. THATCHER, OF BELLEVILLE, NEW JERSEY, ASSIGNOR TO UNDERWOODTYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

STENGLLING MACHINE.

Application filed June 30, 1923. Serial No. 648,650.

To all whom it may concern:

Be it known that I, LINDENA. THATCHER, a citizen of the United States,residing in Belleville, in the county of Essex and State of New Jersey,have invented certain new and useful Improvements in StencilingMachines, of which the following is a specific-a latch. Upon release ofthe latch, the pres sure-roll is permitted to drop. To vary the pressureto enable the machine to handle sheets of different thicknesses, or toproduce light or heavy impressions, and for other purposes, the arm isadjustable about the rock-shaft usually by means of a screw fixedagainst longitudinal movement in a block pivoted on the opera-tlng arm,and threaded into a nut pivotally mounted on another arm fixed on theshaft.

The operator has'to turn the screw experimentally in each direction whendesiring to increase or decrease the pressure, and, if the screw happensto stand in a position where it is nearly withdrawn from the nut,

a slight turn of the screw nay cause discon-' nection of the parts; and111 some cases such disconnection may be caused by the-jar of themachine.

' substantially uniform pressure along the;

Inasmuch as a number of turns of the screw may be necessary in changingthe adjustment, it is dilficult to determine uponthe degree of pressurethat is to be exerted by the pressure-roll when in effective position.

In the usual machine of such type, the supporting frame for thepressure-roll is flexible, and is lifted by means of a cam on therock-shaft, referred to, engaging at the middle a cross-rod joining thefree ends of the pivoted arms, in which the journals of thepressure-roll are mounted, to produce length of the pressure-roll. Dueto the flexlbility of the frame, the pressure-roll may movelongitudinally, thereby causing shifting of, or injury to, the stencll,and even resulting in the catching of the frame on other parts of themachine, and consequent failure to lower the pressure-roll when thecontrolling handle is released.

Further disadvantages arise from supporting the journals of the pressureroll in depressions in the pivoted arms of the sup porting frame. Thejournals ma shift "longitudinally in the depressions, an when the partsbecome corroded or are not kept clean and lubricated, the turning of thestencil-cylinder may cause the journals to ride out of the depressions,thereby causing injury to the stencil and putting the machine out oforder.

Also, in such machines, the usual check or brake comprises asubstantially horizontal arm to engage the inner surface of thestencil-cylinder when the pressure-roll is released. This arm tends tointerfere with the insertion and removal of the stencilcylinder.

An object of this invention is to providesimple and effective means forovercoming such objections, and for effecting other improvements. I

According to the present invention, the adjustment for va-rving thepressure may be effected by means of a rotatable head, pref crab-1ylimited in movement-to a single complete rotation in either direction,and means is provided to indicate the adjustment for any-particularpressure, so that when the pressure of any class of work is known, theadjusting head canbe turned at once to the corresponding position.,Preferably the 1ndicating means is placed on one face of the adjustinghead. For regulating the posltion of the operating arm around therock-shaft, the adjusting head may be provided on its inner side with asnail groove, substantially once around the axis of the head, andreceiving a follower that extends from a lever that is pivoted on theoperating arm, and having a tooth engaging between extending two teethof a member on the shaft. Inasmuch as the snail groove is limitedsubstantially to one turn, the movement of the ad-- v justing head islikewise limited, preventing disconnection, and the head in its movementfrom one limiting position to the other effects all differentadjustments of the operating arm around the shaft. Provision may also bemade of friction means to hold the adjusting head in each position towhich it may be set. It will be evident that disconnection of parts willnot be effected by accigiven pressure the operating arm may be moved toeither of its positions without in any way affecting the adjustment ofthe pressure-roll.

. In order to avoid release of the operating handle without downwardmovement of the pressure-roll, the lifting and lowering of thesupporting frame of the pressure-roll,

provision may be made of suitable means, such as a toggle, to connectthe rock-shaft with the frame, thereby insuring positive downwardmovement of the supporting frame as Well as positive upward movement.

Similar connections with suitable lost motion may be provided to causethe brake to be thrown on as soon as the pressure is withdrawn, and tobe thrown off when the pressure-roll is restored to its effectiveposition.

To avoid the disadvantage arising from the ordinary means for mountingthe pressure-roll on the supporting frame, provision is made of suitableball-bearings on the journals of the pressure-rolland held againstmovement longitudinally thereof, and of spring-clips on the inner facesof the arms of the supporting'frame to receive and detain saidball-bearings. It will be seen that by this arrangement the trouble dueto insufficient cleaning or lubricating is avoided, and there issubstantially .no danger of dismounting the. pressure-roll in theordinary operation of the machine.

Due to the use of ball-bearings mounted in the clips or sockets on thepivotedarms of the supporting frame, longitudinalmovement of thepressure-roll with reference to the frame will be avoided. To avoidexces-.

back of said tapered end, so that, when a journal projecting from thehub is moved into a sultablebearing on one of tlie end aeaaose frames, alatch pivoted on the hearing will ride up on the tapered end and dropinto the groove to hold the stencil-cylinder against longitudinalmovement. The brake is also upturned at its inner end so that, duringthe insertion ofjthe journal into the bearing on the end frame, the edgeof the stencilcylinder will readily pass under the raised end of thebrake and cam it into position to engage the inner surface of the end ofthe stencil-cylinder.

Other features and advantages will hereinafter appear..

.[n the accompanying drawings,

Figure 1 is an end elevation. of a stenciling machine with the novelpressure-adjusting means applied thereto.

Figure 2 is a view, taken in section longitudinally of the cylinder,showing the improved means for controlling the pressureroll and thebrake for the cylinder. Figure 3 is an end elevation, showing thepressure-regulating head set at 0, part of the head being broken away toshow the underlying structure.

Figure tis a view similar to Figure 3, but showlng thepressure-regulating head set at 97,I

Figure 5 is a sectional view of the pressure-regulating means taken in aplane containing the axis of the pressure-controlling shaft.

Figure 6 is a fragmentary view, showing the meansfor supporting one endof the ing thereon.

Figure 8 is a fragmentary perspective view, showing the means forcontrolling the position of the pressure-roll and the brake for thecylinder.

Figure 9 is a view showing the pressureroll in position to co-operatewith the cylinde-r, and the brake for the cylinder in ineffectiveposition.

Figure 10 is a view similar to Figure 9, but showing the pressure-rolldrawn down from the cylinder and thebrake in effective position. f

Figure 11 is a view similar to Figure 10, the. pressure-roll and thecontrolling means therefor being omitted to show the brake and thecontrolling means therefor.

A stencil-cylinder 15 is mounted in end frames or standards 16 and 17respectively, of a frame 18. At the end, supported in the standard 16,-the stencil-cylinder is provided with an annular head 19 mounted ontrundles 20, 21 and 22 rotatably mounted on the standard 16. At itsother end, the stenoil-cylinder 15 is provided with a head 23 comprisinga hollow hub 24 and s Okes 25 A stub-shaft 27 fixed within the upperportion 28 of the standard 17 provides a bearing upon which the hub24'revolves. Pivoted on a pin 29 on the standard 17 is a latch 30controllable by a finger-piece 31 and having a downwardly-extending end32 to ride up on the tapered end of the hub of the head 23 to drop intoa groove 33 on the hub and thereby hold the cylinder against longitudinal movement.

Beneath the cylinder 15 is a pressure-roll 34 rotatably supported inarms 35 pivoted by means of shouldered screws 36 in bosses 37 projectinginwardly from the end frames. The arms 35 are raised to bring thepressureroll 34 into effective position, and also are drawn downwardlytherefrom by means of a finger-piece 38 on an arm 39 mounted on, arock-shaft 40 having fixed thereon an arm 41 forming part of a togglewhich also comprises a link 42 pivoted to the outer end of the arm 41and rotatably mounted at the other end on a crossamember or rod 43joining arms 35, as shown in Figure 2. The upper end of the link 42 islimited in movement along rod 43 by means of collars 44 held againstoutward movement by means of split pins 45 passed through perforationsin the rod 43. To hold the arm 39 in operative position, provision ismade of a latch 46 having a hook 47 to receive the reduced end 48 of thearm 39, and releasable by a fingerpiece 49 on the latch 46. 7

To hold the stencil-cylinder 15 against accidental rotation, when thepressure-roll 34 is withdrawn therefrom, as when positioning a stencilupon said stencil-cylinder, provision is made of a brake 50 providedwith a lining 51 to engage a portion 52 of the annular flange formingpart of the head 23. The brake 50 is substantially U-shaped to extendaround the edge of the annular flange 26, and the lower branch of the U-shaped portion is carried on the end of alever or arm 53 pivoted on oneof the shouldered screws 36, and the arm 53 is urged downwardly by aspring 54 to bring the brake into engagement with the annular flange 26.To place the brake 50 under the control of the finger-piece 38, an arm55 is secured to the shaft 40 and is pivoted at its outer end to thelower end of a link 56 by means of a shouldered screw 57. At its upperend the link is provided with a slot 58 to receive a pin 59 projectingfromthe arm 53. Upon depressing the finger-piece 38, the pressure-roll34 will be lifted to effectdve position. At the beginning of the upwardmovement of the pressure-roll 34 no effect will be produced on the brake50, but, as the link 56 reaches a position to bring the lower endthereof into engagement with the pin 59, the arm 53 will be actuatedagainst the action of the spring-54 tarelease th stencil-cylinder.Obviously, as soon as one B the pressure-roll starts to move down, thebrake 50 becomes effective on the stencilcylin-der 15.

In the usual form of machine, no provision is made for releasing thebrake 50 except in connection with the raising of thepressureroll, butin applicants construction an opening 60 is provided in the standard 17to permit a finger-piece 61 to pass therethrough to become accessible atthe side of the machine. By lifting the finger piec-e 61 the brake 50may be released against the action of the spring 54. It should be notedthat the inwardly-projecting arm 62'of the brake 50 is inclined upwardlyso as to facilitate the insertion of the reduced portion 52 of theannular flange 26 beneath the end of the brake when the'latteris ineffective position. This structure of the brake in connection with thebeveled end of the hub at the righthand end of the cylinder, as shown inFigure 2, facilitates the insertion and removal of the stencil-cylinder.i

When'in use, work-sheets, not shown, are inserted, one by one, overa\table 63 and beneath a deflector 64 into \position to be grippedbetween the stencil-cylinder 15 and the pressure-roll 34. At each sidethe deflector 64 is provided with astripping finger 65 projecting towardthe delivery side of the machine.

In stenciling machines, heretofore in use,' difficulty has arisen fromthe tendency of the pressure-roll to work endwise relatively to thestencil-cylinder and displace or injure the stencil. As hereindisclosed, the arms 35 and the rod 43 form a frame which tends to holdthe pressure-roll more firmly than in machines formerly in use, but toguard against excessive lateral movement of the arms 35, provision ismade of a bracket 66 having an 11 wardly-extending U-shaped portion 67having a slot 68 to receive one of the arms 35.

Furthermore, in the machines heretofore in use, the journals of thepressure-rolls are usually held in shallow depressions in supportingarms, and, when dirt accumulates around the journals and in thedepressions, therotation of the cylinder may'cause the journals to-rideout of the depressions, thus tending to tear the stencil-sheet, andtemporarily put the machine. out of commission. As herein, disclosed,ball-bearings 69 are mounted on journals 70 at the end of the shaft 71on which the pressure-roll 34 is mounted, and'each of the ball-bearings69 is I the ball-bearings 69 are pressed against the flared ends 74ofthe sockets72 the flared ends will beforced outwardly, and, as theball-bearings 69 are inserted, will clip the same to retain them in thesockets. It will be seen that by this arrangement friction is reduced,and the tendency to displace the pressure-roll is eliminated. As shownin Figure 6, each of the ball-bearings 69 includes a set of ballsrunning in a circular' slons on the work-sheets, and for other purposes,provision is made of means to adjust the position of the arm 39 aroundthe shaft 40. To this end, the arm 39 is mounted loosely on the shaft40, which is flattened at 81, and a gear or member 82 having acorrespondingly shaped opening is fitted upon the flattened end 01" theshaft and is thereby held against rotation thereon. The member or gear82 may be provided with two teeth 83 to receive therebetween a tooth 84:on a bell-crank or lever 85 pivoted on the arm 39 by suitable means,such as a shouldered screw 86, and having an arm 87 with a lateralprojection 88 extending into a spiral groove 89 at the inner side of arotatable adjusting head 90, pivotally mounted on the outer end of theshaft 40' by means of a screw 91 pressing a resilient friction washer 92against the outer face of the head. For

the head at different times, the head is provided on its outer,face-with graduations 93 running from O to 9, and with shortergraduations 94 midway between the successive graduations 93, theposition of the head being determined by the graduations 93 and 9 1 inconnection with an index or mark 95 on the arm 39.

The rotation of the stencil-cylinder 15 may be efi'ected by means of ahandle 96 secured to the annular head 19 by suitable means, such as ascrew 97. Provision may also be made of a pin or projection 98, on anarm 99 adjacent the handle 96, to engage at the end of each rotation apin 100 which, in the usual manner, thrusts outwardly a pin or stop 101into the path of pin 98 to check the stencil-cylinder 15 preparatory toinserting another Work-sheet.

Variations may be resorted to within the scope of the invention, andportions of the im rovements may be used without others.

aving thus described my invention, it claim: 7

1. In a stenciling machine, a stencil-cylinder, a pressure-roll toco-operate with the 'bottom thereof, means, including a rockshaft, forpressing said roll against the cylinder, a handle on said rock-shaft foroperneaaoee ating the same, and means to adjustthe handle around saidshaft comprising a rotatable adjusting head having a limited' bottomthereof, means, including a rockshaft, for pressing said roll againstthe cylinder, a handle on said rock-shaft for oper ating the same, andmeans to adjust the bandle around said shaft comprising a rotatableadjusting head limited to one complete turn, and having a scale thereonto -o-operate with an index on said handle to indicate the position ofthe handle relative to the shaft. In a.stenciling machine, astencil-cylinder, a pressure-roll to co-operate with the bottom thereof,means, including a rock shaft, for pressing said roll against thecylinder, a handle on said rock-shaft for operating the same, and meansto adjust the handle around said shaft comprising a rotatable adjustinghead having a limited movement to prevent accidental disengagement, anda friction device to hold said head in any adjusted position.

4. In a stenciling machine, a stencil-cylinder, a pressure-roll toco-operate with the bottom thereof, ineans, including va rockshaft, forpressing said roll against the cylinder, a handle on said rock-shaft foroperating the same. and means to adjust the handle around said shaftcomprising a rotatable adjusting head having a limited movementconvenience in efiectmg similar settings of to-prevent accidentaldisengagement, and a scale at the periphery oi said head to indicate theposition of the handle relative to the shaft.

5.1m a stenciling machine, a revolnble stencil-cylinder, a pressure-rollto co-operate with the bottom thereot, means, including a rock-shaft,for raising and lowering said roll, a handle mounted on said shaft. acatch to hold said handle in eflective position, and means to adjustsaid handle around said shaft to vary the pressure exerted by the rollwhen moved to effective position, in-

cluding a toothed member fixed on said shaft outside said handle. abell-crank pivoted on said handle and having a tooth on one arm toengage between said tooth and a pin proiecting from the side of theother arm, and a revolnble head on said shaft having on its inner side agroove to receive said pin and consisting of a single turn of a spiralto effect all adjustments by one complete revolution and to preventaccidental disconnection of the adjusting means.

6. In a stenciling machine, a revolnble stencil-cylinder, apressure-roll to co-operate with the bottom thereof, means, including arock-shaft, for raising and lowering said roll, a handlemounted-on saidshaft. a catch to hold said handle in eflfective position, and

means to adjust said handle around said shaft to vary the pressureexerted by the roll when moved to effective position, including atoothed member fixed on said shaft outside said handle, a bell-crankpivoted on said handle and having a tooth on one arm to engage, betweensaid tooth and a pin projecting from the side of the other arm, a

revoluble head on said shaft -Having on its inner side a groove toreceive said pin and consisting of a single turn of a spiral to effectall adjustments by one complete revolutiou and to prevent accidentaldisconnection of the adjusting means, and a friction device to hold saidhead in any adjusted position. i

7 In a stenciling machine, a stencil-cylinder, a pressure-roll toco-operate therewith, a frame for supportingsaid roll and comprising twopivotedarms connected by a cross-member, and a guide-member having aslot to receive one of said arms and prevent excessive lateral movementof said frame.

8. In-a stenciling machine, a stencil-cylinder, a pressure-roll toco-operate therewith, journals at the ends of said roll, ball-bearingsmounted on each of said journals and held against movementlongitudinally thereof, and a frame for supporting said roll andcomprising arms having openings to receive said journals, and a springclip on each of said arms to receive and detain said ball-bearings.

'9. In a stenciling machine, a stencil-cylinder, a pressure-roll toco-operate therewith,

journals at the ends of said roll, ball-bearings mounted on each of saidjournals and held against movement longitudinally thereof, and a framefor supporting said roll and comprising arms and a spring clip on eachof said arms to receive and detain said ballbearings. i

10. In a stenciling machine, a stencil-cylinder, a pressure-roll toco-operate therewith, a frame for supporting said roll and comprisingtwo pivoted arms connected by a cross-member, and a toggle for shiftingthe pressure-roll, connected with said crossmember near the middlethereof, to equalize the pressure, of the pressure-roll on the cylinder.j

11. In a stenciling machine, a stencil-cylinder, a pressure-roll toco-operate therewith, a rock-shaft beneath said roll, an actuatinghandle for said shaft, and connections between said roll and said shaftfor positively moving said roll toward and from said cylinder, said rollbeing adjstable relatively to said handle to alter the throw thereof andthereby vary the degree of pressure exerted by said roll against thecylinder. a

12. In a stenciling machine, a stencil-cylinder, a pressure-roll toco-operate therewith, a rock-shaft beneath said roll, an actuatinghandle for said shaft, and toggle connections between said roll and saidshaft for positively moving said'roll toward and from said cylinder,said roll being adjust able relatively to said handle to.alter the throwthereof and tliereby vary the degree of pressure exerted-by said rollagainst the cylinder.

13. In a stenciling machine, a stencil-cyl inder open at one end andhaving at the other end a frame comprising an outwardly: extendingcollar having a peripheral groove and a tapered outer end, a hubextending beyond the beveled end of said collar, means to support theopen end at its periphery, a bearing to receive said hub, a latch onsaid bearing to ride up onithe tapered end of the collar and to dropinto said groove, and a,

brake to engage the inner surface of the bylinder at the end adjacentthe hub, said brake being flared away from the inner surface of thecylinder at its inner end, both the latch gage the inside of'tbecylinder adjacent said.

roll, and means to press the roll against the cylinder and withdraw thebrake and vice versa, comprising a rock-shaft, apressureroll-controlling toggle operable by the rockshaft, and abrake-controlling ,toggle having a lost-motion connection, so as to beineffective to throw ofi the brake until the pressureroll is near itsefiective position.

15. In a stenciling machine, a frame h'aving a bearing at one end, aremovable cylinder having a hub to fit said bearing, means forautomatically engaging and holding the hub against longitudinal movementwhen the hub is inserted in the bearing, and a brake, to engage theinside of the cylinder, in the path of the cylinder as it is inserted inthe frame; said brake having an inclined end so as to ride up inside ofthe cylinder.

16. In a stenciling machine, a frame having a bearing at one end, aremovable cylinder having a hub to fit said bearing, auto- ,matic meansfor clamping the hub against longitudinal movement in the bearing whenthe cylinder is inserted in the frame, and an inside brake for thecylinder arranged to avoid interference with the insertion or withdrawalof the cylinder from the frame when the brake is in effective position.

17. In a stenciling machine, a frame, a revoluble cylinder insertiblelongitudinally in said frame, and an inside brake yieldably urged tohold the cylinder against rotation, and comprising an inclined brake-armto be cammed into the cylinder when the cylinder is inserted in theframe.

18. In a stenciling machine, a frame, a stencil-cylinder, apressure-roll, arms, each pivoted to the frame at one end and supportingone end of the pressure-roll at the other, a cross-member connecting thearms,

and a toggle connected to the middle of the cross-member to permitequalization of the pressure on the stencil-cylinder when the toggle isoperated to press the roll against the cylinder.

19. In a stenciling machine, the combination of a stencil-cylinder, apressure-roll to co-operate therewith, means to press the pressure-rollagainst the cylinder, and means, including a cam having a spiral groove,for adjusting the feed-roll pressure.

20. In a stenciling machine, a stencil-cylinder, a pressure-roll, andmeans for shifting the roll toward and from the cylinder, comprising atoggle, a rock-shaft for ac tuating the toggle, an arm for rotating theshaft, a catch for holding the arm in operated position, and means foradjusting the arm around the shaft to vary the pressure of the roll whenmoved against the cylinder, comprising a gear having two teeth and beingfixed on the shaft, a bell-crank on said arm having one branch providedwith a tooth fitting between the gear teeth and the other branchprovided with a projection, and a head rotatable on said shaft andhaving'a spiral groove to receive said projection so that rotation ofsaid head will shift said bell-crank and cause a relative movementbetween said arm and said shaft.

21. In a stenciling machine, a. stencil-cylinder, a pressure-roll, andcontrollin means for'said roll, comprising a rock-s iaft, a

two-toothed gear fixed on the shaft, a lever for rotating the shaft,loosely mounted thereon, a bell-crank pivoted on the lever and havingone arm provided with a tooth fitting between the teeth of the gear, anda cam having a spiral groove to receive the second arm of the bell-crankfor shifting the bell-crank and thereby varying the relative positionsof the bell-crank and the gear.

22. In a stenciling machine, the combina tion of a stencil-cylinder, apressure-roll, means for varying the pressure of the rollon thestencil-cylinder when the machine is set for operation, and means,including a graduated scale, for indicating the setting of said varyingmeans.

23. In a stenciling machine, a stencil-cylinder, a pressure-roll tocooperate therewith and having 'ournals projecting from its ends,ball-bearings mounted on each of said journals and held against movementlongitudinally thereof, arms for supporting the pressure-roll, andspring cups on the arms for receiving and detaining the ballbearings.

24:. In a stenciling machine, a stencil-cylinder, a pressure-roll, abrake contacting with the cylinder when the pressure-roll is withdrawntherefrom, means for simuleas es roll is nearly in operativeposition'and to throw on the brake at the beginning of the withdrawingmovement of the roll.

25. In a stenciling machlue, a StGIICIl'Cylinder, a pressure rolltherefor, means for adjusting the degree of pressure of said rollagainst the cylinder, and means for moving the adjusted roll toward or"away from the cylinder, said adj usting means operating independently ofand being unaffected by said roll-moving means during operation thereof.

26. In a stenciling machine. a stencil-cylinder, a pressure rolltherefor. means for moving said pressure roll toward or away from thecylinder, and means for adjusting the degree of movement of saidroll-moving means, whereby to vary the pressure of said roll against thecylinder.

27. In a stenciling machine, a stencil-cylin der, a pressure rolltherefor, means including an actuating arm for moving the roll toward oraway 'from the cylinder, and means for adjusting the length of throw ofsaid arm, whereby to vary the degree of pressure exerted by said rollagainst the cylinder.

28. In a stenciling machine, a stencil-cylinder, a pressure rolltherefor, means including an actuating arm for moving the roll toward oraway from the cylinder, means for adjusting the length of throw of saidarm, whereby to vary the degree of pressure exerted by said roll againstthe cylinder, and releasable means for engaging said actuating arm tohold the roll against the cylinder in adjusted relation. 7

29. In a stenciling machine, a stencil-cylinder, a pressure rolltherefor, means for moving said re'ssure roll toward or away from thecylinder, and a camming device movable to adjust the relation of saidrollmoving means with respect to the roll, whereby to alter the lengthof travel of said roll-moving means and thereby vary the degree ofpressure exerted by said roll against the cylinder.

30. In a stenciling machine,-a stencil-cyL inder, a. pressure rolltherefor, means for moving said pressure roll toward or away from thecylinder, and a camming device movable to adjust the relation of saidrollmoving means with respect to the roll, whereby to alter the lengthof travel of said roll-moving means and thereby vary the degree ofpressure exerted by said roll against the cylinder, said camming deviceoperating through a long range of move ment to thereby rovide a fineadjustment.

31. In a stenciling machine, a stencil-cylinder, a pressure rolltherefor, means for moving said pressure roll toward or away from thecylinder, and a camming Idevice movable to, adjust the relationof saidrollwhereby to accomplish a fine adjustmentthrough a long range ofmovement.

32- In a stenciling machine, a stcncll-c linder, a pressure rolltherefor, means or moving said pressure roll toward or away from thecylinder, and a camming device movable to adjust the relation of saidrollmoving means with respect. to the roll, whereby to vary the degreeof pressure ex-' erted by the latter against the cylinder, said'ca'mmlng device operating through a long range of movement to therebyprovide a fine adjustment and effecting a locking action with saidmoving means to hold the latter .and the pressure roll in adjustedrelation.

33. In a stenciling machine, a stencil-c llnder, a pressure rolltherefor, -means or supporting said pressure roll, an actuating arm foroperating the supporting means whereby to move the roll toward or awayfrom the cylinder, means for adjusting thev position of said arm withrelation to said supporting means, whereby to adjust the degree ofpressure exerted by the roll against the cylinder, and means for holdingthe arm whereby to retain the roll against the cylinder, said holdingmeans being releasable to permit the roll to move away from thecylinder. Y

' 34. In a stenciling machine, a stencil-cylinder, a pressure rolltherefor, a carrier for the pressure roll, an actuating arm for causingsaid carrier to move the pressure roll toward or away from the cylinder,a camming device movable to adjust the position of said carrierrelatively to said arm, whereby to adjust the degree of pressure exertedby the roll against the cylinder, and

means automatically engaging said arm to retain the roll when movedagainst the cyllHCl61','Sa'ld means releasable to permit said roll tomove away from the cylinder.

35. In 'a stenciling machine, a stencil-cylinder, a pressure rolltherefor, means for moving said pressure roll toward or, away from thecylinder, and an adjustable camming device between'said roll-movingmeans and the pressure roll, whereby to vary the pressure of said rollagainst the cylinder, said device operating independently of andunaffected by said roll-moving means.

, 36. In a stenciling machine, a stencil-c l- .inder, a pressure rolltherefor, a swinga le frame for supporting said pressure roll, a

1 rock-shaft, an equalizing connection between said rock-shaft and saidframe, an arm for actuating said rock-shaft, and a movable connectionbetween said actuating arm and the rock-shaft including a graduatedwheel.

ing said actuating arm relatively to the roll V whereby to adjust thedegree of pressure exerted by the latter against the cylinder, saidmeans including an ad usting wheel having a long spirahslot, and meanscarried by said arm and engaging said slot, whereby, when-tho .wheel 1sturned, saidspiral slot cii'ects a relative movement of said actuatingarm with relation to the pressure roll.

38. In a stenciling machine, a stencil-cylinder, a pressure rolltherefor, a support for said pressure roll, means for actuating saidsupport whereby to move said roll toward or away from thestencil-cylinder, and means for preventing accidental rotation of thecylinder when the roll is moved away therefrom, said last-named ineansbeing independently operable to release said cylinder.

39. In a stenciling machine, a stencil-cylinder, .a pressure rolltherefor, a Support for said pressure roll, means for actuating saidsupport whereby to move said roll toward or away from thestencil-cylinder, and a brake engaging said cylinder when the pressureroll has moved away therefrom, said brake being independently operableto release the cylinder to permit the same to be removed from themachine, or to facilitate replacement of said cylinder.

40. In a stenciling machine, a stencil-cylinder, a pressure rolltherefor, means including a rock-shaft and an actuating arm for pressingsaid roll against the cylinder or shaft whereby to vary the pressure ofsaid roll against the cylinder, said means including a calibratedadjusting wheel co-operating with an index on said arm to indicate thedegree of pressure of said. roll against the stencil-cylinder.

41. In a stenciling machine, a stencil-cylinder, a pressure roll toco-operate therewith, means including a rock-shaft for moving said rolltoward or away from the cylinder, a handle on said rock-shaft foroperating the same, and means for connecting and adjusting the handlearound said shaft whereby to vary the pressure of said roll against thecylinder, said shaft having a locking action with saidhandle whereby tomaintain the latter in any adjusted position.

42. In a stenciling machine, a stencil-cylinder, a pressure roll tocooperate therewith, means including a rock-shaft tor movin; said rollagainst or away from the cylinder, a handle on said rock-shaft foroperating the same and means for connecting and adjusting the handlearound said shaft. to alter the length of throw of said handle andthereby vary the pressure otfsaid roll when moved against the cylinder.said adjusting means including an indexing device for indieating thesetting thereof.

43. In a stenciling machine a stencil-cylinder, a pressure roll to(-o-operate therewith, means including a rock-shaft and a handle thereonfor moving said r011 against or away from the cylinder, means forconnecting' and adjusting the handle around said shaft whereby to varythe pressure of said roll against the cylinder, said adjusting meansincluding an indexing device for 1,55e,cee

indicating the setting; thereof, and a friction device for preventingaccidental movement of said indexing device when adjusted to anyposition. i

44. In a stenciling' machine, a stencil-cylinder. a pressure roll toco-operate with the bottom thereof, means including: av rockshaft and, ahandle on said rock-shaft for moving! said roll toward or away from thecylinder, a calibrated adjusting wheel eonnectinp; said handle tothe-shaft, said wheel V effective, when turned, to change the relationof the handle with respect to -'the shaft whereby to alter the length ofthrow of said handle and thereby vary the pressure of said roll againstthe cylinder, and means for preventing lateral movement of said rollrelalive to the cylinder.

LINDEN A. THATCHER.

